Is tenability human body normal what is visual vitamin?
可维持人体正常视觉的维生素是什么？
2
Correct mattess should be tactility softness, tall flexibility, curve of physiology of tenability human body and permeability is good.
正确的床垫应该是触感柔软，高弹性，可维持人体生理曲线并且透气性好。
3
The tenability of "Walras's law" is the prerequisite of general equilibrium, and the tenability of the law is the result of the aggregate of individual budget.